Score breaking mechanism for gable top carton

ABSTRACT

A score breaking mechanism comprises a vertically reciprocable carriage having a pair of roof panel wings and a pair of gable panel wings mounted thereon. As the carriage is lowered toward a carton having score lines to be broken, two racks slidably mounted in the carriage contact stops, and upon continued downward movement of the carriage the racks rotate a pair of pinion gears attached to the gable panel wings to rotate the wings inwardly toward each other and into folding contact with the gable panels of the carton. When the downward movement of the carriage ceases, the roof panel wings are rotated inwardly toward each other over the enfolded gable panels to complete the score breaking operation. The roof panel wings are then rotated away from the carton before the carriage starts its upward movement, after which the gable panel wings are rotated away from the carton to clear the carton.

[Jnite States Patent [1 1 Farfaglia Nov.5, 1974 SCORE BREAKINGMECHANISM. FOR

GABLE TOP CARTON [75] Inventor: Silvio T. Farfaglia, Fulton, NY.

[73] Assignee: Phillips Petroleum Company,

Bartlesville, Okla.

[22] Filed: Sept. 7, 1973 [21] Appl. No.: 395,026

[56] References Cited UNITED STATES PATENTS 9/1965 Monroe et al. 53/375X 10/1973 Owen Primary Examiner-Travis S. McGehee [5 7] ABSTRACT A scorebreaking mechanism comprises a vertically reciprocable carriage having apair of roof panel wings and a pair of gable panel wings mountedthereon. As the carriage is lowered toward a carton having score linesto be broken, two racks slidably mounted in the carriage contact stops,and upon continued downward movement of the carriage the racks rotate apair of pinion gears attached to the gable panel wings to rotate thewings inwardly toward each other and into folding contact with the gablepanels of the carton. When the downward movement of the carriage ceases,the roof panel wings are rotated inwardly toward each other over theenfolded gable panels to complete the score breaking operation. The roofpanel wings are then rotated away from the carton before the carriagestarts its upward movement, after which the gable panel wings arerotated away from the carton to clear the carton.

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' FIG. 5

SCORE BREAKING MECHANISM FOR GABLE TOP CARTON The invention relates tomechanisms for breaking score lines in a carton. In a specific aspect itrelates to score breaking mechanism for gable top cartons.

In a filling and sealing machine for paperboard gable top cartons, it isfrequently desirable to break the score lines forming the gable topstructure prior to heating the ridge panels to minimize the mechanicalhandling of the heated panels. When the score lines are broken beforeheating, the carton is generally moved to the heating station with thetop structure partially open. With hot gas heater heads which enclosethe top of the carton, it is important that the score breaking operationbe consistent from carton to carton to avoid contact between the cartonand the heater headrlt is also desirable that the score breakingoperation be accomplished at a single work station to minimize the sizeof the machine.

Accordingly, it is an object of the invention to provide a new andimproved score breaking mechanism. Another object is to minimize thework space occupied by a score breaking mechanism. Yet another object ofthe invention is to provide consistency in the shape to which a scoredcarton is formed in a score breaking operation. A further object of theinvention is to avoid damage to a carton during a score breakingoperation.

Other objects, aspects and advantages of the invention will be apparentfrom a study of the specification, the drawings and the appended claimsto the invention.

In the drawings, FIG. 1 is a front elevational view of a carton forming,filling and sealing machine embodying the present invention;

FIG. 2 is a simplified side elevational view, partly in cross section,of the score breaking mechanism of the machine of FIG. 1 in the up orretracted position;

FIG. 3 is a simplified side elevational view, partly in cross section,of the score breaking mechanism of FIG. 2 in an intermediate position;

F IG. 4 is a simplified side elevational view, partly in cross section,of the score breaking mechanism of FIG. 2 in the fully down or cartonengaging position;

FIG. 5 is a simplified front elevational view, partly in cross section,taken along line 5-5 in FIG. 4;

FIG. 6 is a simplified plan view, partly in cross section, taken alongline 6--6 of FIG. 4;

FIG. 7 is a detail elevational view of the rack and pinion mechanism forthe triangular gable wings;

FIG. 8 is a detail elevational view of the mechanism for the roof panelwings;

FIG. 9 is a perspective view of the upper portion of a gable top cartonbefore the score breaking operation; and

FIG. 10 is a perspective view of the carton of FIG. 9 after the scorebreaking operation.

Referring now to the drawings in detail and to FIG. 1 in particular, thecarton forming, filling and sealing machine comprises a forming section11 and a filling and sealing section 12. The forming section 111comprises a sidewall blank feeding and heating subsection 13, a bottomblank feeding and heating subsection 14, a forming subsection 15, and atransfer subsection 16. The filling and sealing section has two parallelendless conveyor systems 17, and each conveyor system comprises afilling subsection 18 occupying five conveyor stations, a defoamingstation 19, a score breaking station 20, a top heating station 21, afolding and sealing station 22, a secondary sealing station 23, abranding station 24, and a transfer station 25.

The sidewall blanks 31 manually placed in the sidewall blank magazine 32are flat, single sheets of paperboard, rectangular in shape, scored toprovide five longitudinal panels, and gable top structure, and coated onboth the top and bottom surfaces of each sheet with a thermoplasticmaterial, e.g., polyethylene. The sidewall blanks 31 are successivelywithdrawn from magazine 32 and intermittently advanced through thesidewall blank heating station 33 to the sidewall blank receivingstation 34 for turret 35. At the sidewall blank heating station 33, theside margins to be overlapped and the bottom margin of the sidewallblank are heated to a bonding temperature for the thermoplastic coating.

The turret 35 is journalled on a horizontal axis and carries eightcircumferentially spaced apart mandrels 36 extending radially from theaxis of turret 35. The cross section of each of mandrels 36 in a planeperpendicular to its longitudinal axis is generally rectangular.Suitable drive mechanism is provided for indexing or effectingintermittent rotation of the turret 35 to move each mandrel from thesidewall blank receiving station 34 through a blank folding station 37;a bottom and closure forming, applying and sealing station 38; asecondary bottom sealing station 39, a stripping station 40, and threesuccessive nonoperating stations 41, 42 and 43.

The tubular carton body having a bottom closure sealed thereto isremoved from the mandrel 36 at the stripping station 40 and istransferred to a conveyor pocket 45 of one of the two conveyor systems17. The product to be packaged is introduced into the opentopped tubularcarton in the filling subsection 18. If desired, any foam resulting fromthe filling operation can be removed at defoaming station 19. The scoresfor the gable top structure can be initially folded in the scorebreaking station 20, resulting in the conventional sixsided topstructure. The gable top ridge panels of the carton are heated instation 21 to a temperature at least as high as the thermal bondingtemperature of the thermoplastic coatings on the carton. The heatedsuperstructure is then folded into contact under pressure at the foldingand sealing station 22 to effect the bonding of adjacent ridge panels.Secondary sealing station 23 applies pressure to the ridge panels duringcooling of the thermoplastic bond. If desired, a date indicia, plantidentification or other information can be applied to the bonded ridgepanels of the sealed carton at branding station 24. The formed, filledand sealed carton is removed from its conveyor pocket 45 at the transferstation 25 and placed on a delivery conveyor 46.

Referring now to FIGS. 28, the score breaking mechanism 20 has a supportframe 51 having a base 52 mounted on the frame of the carton filling andsealing machine section 12 above a cam shaft, not shown. Push rod 53 isreciprocated through support 54 by the cam shaft. Push rod 53 isconnected to shaft 55 through adjustable linkage 56 for reciprocation ofshaft 55 to drive a pair of score breaker mechanisms 20, one on eachside of support 51. Only one score breaker mechanism 20 is shown sinceboth are identical. Clevis 57 is mounted on the upper end of shaft 53and is pivotably connected to crank arm 58 through pin 59. Crank arm 58is fixedly connected to shaft 60, which is pivotably mounted in support51. Also affixed to shaft 60 is lever arm 61, which has at the oppositeend thereof clevis 62 which is connected in pivotal relationship tolinkage 63 by pin 64. The arcuate movement of lever arm 61 causeslinkage 63, connected to clevis 65 by pin 66, to vertically reciprocatethe drive push rod for the left score breaker mechanism, not shown.Linkage 67 is connected in pivotal relationship to both lever arm 61 andlinkage bar 68. Linkage bar 68 is pivotable about pin 69, supported inframe 51. The opposite end of linkage bar 68 is pivotably connected toU-shaped arm 70 by pin 71. The opposite end of U-shaped bar 70 isconnected to clevis 65 of the right score breaker by pin 66 to drivepush rod 72. The reciprocation of shaft 55 through the linkageheretofore described will reciprocably drive the push rods 72 of the twoscore breaker mechanisms in an identical manner.

Carriage 73 is slidable to a limited extent on push rod 72 by virtue ofthe bias provided by spring 74 against the lower shoulder 75 of clevis65 and the top of carriage 73, forcing carriage 73 against stop 76 atthe lower end of push rod 72. Carriage 73 is supported by plate 77 whichguides the movement of carriage 73 by being slidable in the ways 78 ofthe main frame of the filling and sealing machine section 12 (See FIG.6).

Support 79 is attached to the front end of carriage 73 and plate 80 issecured to the lower outward edge of support 79. Attached to the innersurface of plate 80 are gable wing supports 81. A rotatable shaft 82 ishorizontally mounted in supports 81. A pinion gear 83 and a triangulargable wing 84 are mounted on shaft 82 for rotation therewith. A shaft 85having a gear rack 86 on the lower end thereof is mounted in one ofsupports 81 for reciprocal movement in a vertical direction with thegear rack 86 engaging pinion gear 83. A spring 87 is mounted about shaft85 and extends from a shoulder 88 on the upper end of gear rack 86 to ashoulder 89 of support 81 to bias the rack 86 to the downwardly extendedposition. Shaft 82 rotates gable wing 84 inwardly toward the carton 50during the downward movement of the carriage 73 after the rack 86contacts stationary stop 90 attached to the frame of the machine byelement 91, causing the relative movement between rack 86 and carriage73 to drive pinion gear 83.

A rotatable shaft 92 is horizontally mounted in carriage 73 oppositeshaft 82 so that shafts 82 and 92 are parallel to each other. A piniongear, not shown, is mounted on shaft 92 for rotation therewith. A shaft93 is mounted in carriage 73 for reciprocating movement in a verticaldirection. Gear rack 94 is mounted on the lower end of shaft 93 and isengaged by the pinion gear. A spring 95 is mounted about shaft 93 andextends between shoulders 96 and 97 to bias the rack 94 to thedownwardly extended position. Triangular gable wing 98 is mounted onshaft 92 for rotation thereabout inwardly toward the carton 50 duringthe downward movement of carriage 73 after rack 94 contacts stationarystop 99, attached to frame 51. Thus, the mechanisms for operating gablewings 84 and 98 are essentially identical.

Push rod 72 has a large diameter portion 101 and a small diameterportion 102 separated by shoulder 103. The large diameter portion 101extends into opening 104 of carriage 73. Fixedly attached against theshoulder 103 of push rod 72 is gear rack 105 (see FIG. 8) which engagespinion gears of 106 and 107. Roof panel wing 108 and pinion gear 106 arefixedly attached to shaft 109 for rotation therewith. Roof panel wing110 and pinion gear 107 are fixedly attached to shaft 111 for rotationtherewith. Shafts 109 and 111 are horizontally mounted in carriage 73 soas to parallel to each other and perpendicular to shaft 82 and 92.Reciprocal movement of the gear rack 105 in a vertical direction causesthe arcuate motion of roof panel wings 108 and 110 simultaneously withthe shaft 109 and 11 1, respectively. During the downward movement ofpush rod 72, carriage 73 and associated components are moved downwardlyto engage a carton 50 held in score breaking position by conveyor 17.The racks 86 and 94 first contact the stops and 99, respectively.Additional downward movement of the carriage 73 causes the gable wings84 and 98 to fold inwardly against the end panels of the carton beforethe roof panel wings 108 and 110 begin their inward movement. Additionaldownward movement of the carriage 73 causes the slide plate 77 tocontact stop 112 attached to support 51, stopping the movement ofcarriage 73. Since the push rod 72 is slidable within carriage 73against the bias spring 74, further movement of the push rod 72 withincarriage 73 causes rack to rotate pinion gears 106 and 107, folding roofpanel wings 108 and inwardly against the roof panels of the carton tocomplete the score breaking (see FIGS. 4, 6 and 10). As the carriage 73reaches its lower limit of travel before the inward rotation of roofpanel wings 108 and 110 begins, the shaft 109 and 111 are stationary,with respect to vertical movement. during the rotation thereof and arelocated at points outwardly and downwardly of the lower edge of the roofpanels 133 and 134, so that roof panel wings 108 and 110 have a largearea of contact with roof panels 133 and 134 during the folding of theroof panels 133 and 134 inwardly. This large area of contact, as opposedto a line of contact, provides support for the roof panels 133 and 134during the folding operation, minimizing the possibility of forming foldlines at location other than the score lines. The subsequent upwardmovement of push rod 72 caused by the reciprocation of shaft 54 and itsassociated linkage initially causes the roof panel wings 108 and 110 tofold outwardly and then causes the carriage 73 to begin its upwardmovement as soon as stop 76 contacts the bottom of carriage 73. Theupward motion of carriage 73 permits springs 87 and 95 to move racks 86and 94 downwardly with respect to carriage 73, thereby rotating shafts82 and 92 to retracting gable wings 84 and 98 to their verticalposition.

Referring now to FIGS. 9 and 10, the carton 50 has vertical score lines115, 116, 117, and 118 to form the four vertical sides of the carton. Aseries of horizontal score lines 119, 120, 121, and 122 form the bottomof the gable top structure, while a second series of horizontal scorelines 123, 124, 125, and 126 form the bottom of the six ridge panels127, 128, 129, 130, 131 and 132. Score lines 115, 116, and 124 defineone roof panel 133, while score lines 117, 118, 122 and 126 define theopposite roof panel 134. Score line 135 divides ridge panels 127 and128, while score line 136 divides ridge panels and 131. Score line 137extends from the intersection of score lines 115 and 119 to theintersection of score lines and 123, while score line 138 extends fromthe intersection of score lines 118 and 119 to the intersection of scorelines 135 and 123, to form the first triangular fold back panel 139, thecentral triangular panel 140 and the second fold back panel 141.Similarly, score line 142 extends from the intersection of score lines116 and 121 to the intersection of score lines 125 and 136 while thescore line 143 extends from the intersection of score lines 117 and 121to the intersection of score lines 125 and 136, to form the firsttriangular fold backpanel 144, the central triangular panel 145 and thesecond fold back panel 146.

In operation, a carton 50 carried by conveyor 17 is positionedunderneath the score breaker mechanism 20. The carriage 73 is initiallyin the up or retracted position, as shown in FIG. 2. The initialdownward motion of the push rod 53 causes adjustable link 56 and shaft55 to move downwardly, rotating crank 58 in a counterclockwise directionalong with lever arm 61, causing a downward movement of link 67 and aclockwise rotation of lever bar 68. The clockwise rotation of lever bar68 moves U-shaped bar 70 downwardly, driving push rod 72 downwardly. Thedownward movement of push rod 72 moves carriage 73 downwardly. Ascarriage 73 moves downwardly, bringing the gable panel wings 84 and 98and the roof panel wings 108 and 110 into close proximity to the top ofthe carton 50, racks 86 and 94 contact the stops 90 and 99,respectively. Additional downward movement of the carriage 73 causesracks 86 and 94 to drive gable panel wings 84 and 98 inwardly againstthe panels 140 and 145, breaking the score lines 119, 121, 135, 136,137, 138, 142 and 143. Gable panel wings 84 and 98 have a triangularconfiguration with the base thereof being attached to the respectiveshaft. The apex portion of gable panel wings 84 and 98 conforms to andis slightly smaller than triangular panels 140 and 145 so that the apexportion of wings 84 and 98 contact only the respective panel 140 or 145during the folding operation. During the contact of wings 84 and 98 withpanels 140 and 145, the sides of the wings are preferably at leastsubstantially parallel to the respective set of score lines 137, 138 and142, 143, as well as being in close proximity thereto. When the carriage73 has reached the lower limit of its travel by contacting stop 112, thepush rod 72 continues its downward movement against the bias of spring74 pushing rack 105 downwardly to drive pinion gears 106 and 107 and theassociated roof panel wings 108 and 110 against the roof panels 133 and134, breaking score lines 120 and 122, and folding the roof panels 133and 134 inwardly over the already enfolded gable ends. Roof panel wings108 and 110 are generally rectangular in configuration and are at leastsubstantially coextensive with roof panels 133 and 134 in the lowermostposition of the roof panel wings. By having wings 108 and 110substantially the same size or larger than the roof panels, the roofpanels 133 and 134 are supported throughout the extent thereof, thusminimizing the possibility of buckling or folding other than along ascore line. At this point all the components have reached the lowerlimit of their travel (see FIGS. 4 and 6). Further rotation of the camshaft, not shown, causes an upward travel of the shaft 55, andassociated linkage to move push rod 72 upwardly. The initial upwardmovement of push rod 72 reverses the procedure heretofore described bypermitting rack 105 to move upwardly to drive pinion gears 106 and 107to move the associated roof panel wings 108 and 110 outwardly. Furtherupward movement of the push rod 72 causes stop 76 to contact carriage73, moving carriage 73 upwardly and allowing the racks 86 and 94 to movedownwardly due to the bias of springs 87 and 95. As the racks 86 and 94move away from stops and 99, the gable panel wings 84 and 98 moveoutwardly away from the carton 50. As the push rod 72 and the carriage73 continue their upward movement to their upper limit as shown in FIG.2, the scorebroken carton 50 is cleared for movement to the sealingstation by conveyor 17. Another carton moves into position underneaththe score breaker, and the cycle is repeated. Thus, the score linesforming the gable top structure are broken in a uniformly reproducibleshape without damage to the carton and without the necessity ofinserting a mandrel inside the carton to serve as an anvil.

Reasonable variations and modifications are possible within the scope ofthe foregoing disclosure, the drawings and the appended claims to theinvention.

That which is claimed is:

1. Apparatus for breaking score lines in the upper portion of an opentop tubular carton having first and second opposing roof panels joinedby first and second opposing gable panels to form a gable top structure,each of said gable panels comprising a central triangular panel joinedto one of said roof panels by a first triangular fold back panel and tothe other of said roof panels by a second triangular fold back panel,comprising a carriage; means for effecting reciprocal movement of saidcarriage between a retracted position and a carton engaging positionlocated over a score breaking station; support means for guiding saidcarriage during the reciprocal motion of said carriage; first, second,third and fourth shafts mounted in said carriage, with said first andsecond shafts being parallel to each other, and said third and fourthshafts being parallel to each other and perpendicular to said first andsecond shafts; first and second triangular gable wings mounted on saidfirst and second shafts, respectively, for arcuate movement about theaxis of the respective shaft; first and second roof panel wings mountedon said third and fourth shafts for arcuate movement about the axis ofthe respective shaft; actuating means responsive to said means foreffecting reciprocal movement of said carriage to effect the arcuatemovement of said first and second gable wings about the respective axisof the first and second shafts into contact with the first and secondopposing gable panels, respectively, of a carton in said score breakingstation to fold said first and second opposing gable panels inwardlytoward each other during the movement of said carriage from saidretracted position toward said carton engaging position, to subsequentlyeffect the arcuate movement of said first and second roof panel wingsabout the respective axis of said third and fourth shafts into contactwith the first and second opposing roof panels of said carton in saidscore breaking station to fold said first and second 0pposing roofpanels inwardly toward each other over the enfolded first and secondopposing gable panels, to thereby break score lines forming the firstand second opposing roof panels and the first and second opposing gablepanels, to thereafter effect the arcuate movement of said first andsecond roof panel wings about the respective axis of said third andfourth shafts away from said first and second opposing roof panels ofsaid carton in said score breaking station, and then during the movementof said carriage from said carton engaging position toward saidretracted position to effect the arcuate movement of said first andsecond gable wings about the respective axis of said first and secondshafts away from said first and second opposing gable panels of saidcarton in said score breaking station to clear said carton.

2. Apparatus in accordance with claim 1 wherein said actuating meanscomprises first and second pinion gears mounted on said first and secondshafts, respectively, for rotation therewith, first and second racksmounted in said carriage for vertical movement with respect thereto inengagement with said first and second pinion gears, respectively, meansfor biasing said first and second racks in the down position, and stopmeans for engaging said first and second racks at a point in thedownward travel of said carriage to stop the downward movement of saidracks while said carriage continues to move downwardly, therebyeffecting relative movement between said racks and said carriage torotate said first and second shafts to move said first and second gablewings into folding contact with said first and second opposing gablepanels.

3. Apparatus in accordance with claim 2 wherein said actuating meansfurther comprises a drive shaft mounted in said carriage for verticalmovement relative thereto, means biasing said carriage downwardly onsaid drive shaft, third and fourth racks mounted on said drive shaft formovement therewith, third and fourth pinion gears mounted on said thirdand fourth shafts, respectively, in engagement with said third andfourth racks, respectively, and second stop means to stop the downwardmovement of said carriage after said first and second gable wings havebeen rotated into folding contact with the first and second opposinggable panels of the carton in said score breaking station while per.-mitting the continuation of the downward movement of said drive shaftagainst said means biasing said carriage, to effect relative movement ofsaid drive shaft and said carriage to rotate said third and fourthshafts to move said first and second roof panel wings into foldingcontact with the first and second opposing roof panels.

4. Apparatus in accordance with claim 3 wherein said actuating meansfurther comprises shoulder means on the lower portion of said driveshaft for engaging a shoulder on said carriage during the upward travelof 8 said drive shaft to raise said carriage with said drive shaft afteran initial period of upward movement of said drive shaft with respect tosaid carriage.

5. Apparatus in accordance with claim 4 wherein said first, second,third and fourth shafts are located below the bottom of said gablepanels and said roof panels of said carton in said score breakingstation when said first and second roof panel wings are in contact withsaid roof panels.

6. Apparatus in accordance with claim 5 wherein each of said first andsecond roof panel wings has a generally rectangular configuration whichis at least substantially the size of the respective one of said roofpanels; and wherein each of said first and second triangular gable wingsis shaped and positioned to contact only the central triangular panel ofthe respective gable panel.

7. Apparatus in accordance with claim 1 wherein said actuating meanscomprises a drive shaft mounted in said carriage for vertical movementrelative thereto, means biasing said carriage downwardly on said driveshaft, first and second racks mounted on said drive shaft for movementtherewith, first and second pinion gears mounted on said third andfourth shafts, respectively, in engagement with said first and secondracks, respectively, and stop means to stop the downward movement ofsaid carriage after said first and second gable wings have been rotatedinto folding contact with the first and second opposing gable panels ofthe carton in said score breaking station while permitting thecontinuation of the downward movement of said drive shaft against saidmeans biasing said carriage, to effect relative movement-of said driveshaft and said carriage to rotate said third and fourth shafts to movesaid first and second roof panel wings into folding contact with thefirst and second opposing roof panels.

8. Apparatus in accordance with claim 7 wherein said actuating meansfurther comprises shoulder means on the lower portion of said driveshaft for engaging a shoulder on said carriage during the upward travelof said drive shaft to raise said carriage with said drive shaft afteran initial period of upward movement of said drive shaft with respect tosaid carriage.

1. Apparatus for breaking score lines in the upper portion of an opentop tubular carton having first and second opposing roof panels joinedby first and second opposing gable panels to form a gable top structure,each of said gable panels comprising a central triangular panel joinedto one of Said roof panels by a first triangular fold back panel and tothe other of said roof panels by a second triangular fold back panel,comprising a carriage; means for effecting reciprocal movement of saidcarriage between a retracted position and a carton engaging positionlocated over a score breaking station; support means for guiding saidcarriage during the reciprocal motion of said carriage; first, second,third and fourth shafts mounted in said carriage, with said first andsecond shafts being parallel to each other, and said third and fourthshafts being parallel to each other and perpendicular to said first andsecond shafts; first and second triangular gable wings mounted on saidfirst and second shafts, respectively, for arcuate movement about theaxis of the respective shaft; first and second roof panel wings mountedon said third and fourth shafts for arcuate movement about the axis ofthe respective shaft; actuating means responsive to said means foreffecting reciprocal movement of said carriage to effect the arcuatemovement of said first and second gable wings about the respective axisof the first and second shafts into contact with the first and secondopposing gable panels, respectively, of a carton in said score breakingstation to fold said first and second opposing gable panels inwardlytoward each other during the movement of said carriage from saidretracted position toward said carton engaging position, to subsequentlyeffect the arcuate movement of said first and second roof panel wingsabout the respective axis of said third and fourth shafts into contactwith the first and second opposing roof panels of said carton in saidscore breaking station to fold said first and second opposing roofpanels inwardly toward each other over the enfolded first and secondopposing gable panels, to thereby break score lines forming the firstand second opposing roof panels and the first and second opposing gablepanels, to thereafter effect the arcuate movement of said first andsecond roof panel wings about the respective axis of said third andfourth shafts away from said first and second opposing roof panels ofsaid carton in said score breaking station, and then during the movementof said carriage from said carton engaging position toward saidretracted position to effect the arcuate movement of said first andsecond gable wings about the respective axis of said first and secondshafts away from said first and second opposing gable panels of saidcarton in said score breaking station to clear said carton.
 2. Apparatusin accordance with claim 1 wherein said actuating means comprises firstand second pinion gears mounted on said first and second shafts,respectively, for rotation therewith, first and second racks mounted insaid carriage for vertical movement with respect thereto in engagementwith said first and second pinion gears, respectively, means for biasingsaid first and second racks in the down position, and stop means forengaging said first and second racks at a point in the downward travelof said carriage to stop the downward movement of said racks while saidcarriage continues to move downwardly, thereby effecting relativemovement between said racks and said carriage to rotate said first andsecond shafts to move said first and second gable wings into foldingcontact with said first and second opposing gable panels.
 3. Apparatusin accordance with claim 2 wherein said actuating means furthercomprises a drive shaft mounted in said carriage for vertical movementrelative thereto, means biasing said carriage downwardly on said driveshaft, third and fourth racks mounted on said drive shaft for movementtherewith, third and fourth pinion gears mounted on said third andfourth shafts, respectively, in engagement with said third and fourthracks, respectively, and second stop means to stop the downward movementof said carriage after said first and second gable wings have beenrotated into folding contact with the first and second opposing gablepanels of the carton in said score breaking station while permitting thecontinuation of the downward movement of said drive shaft against saidmeans biasing said carriage, to effect relative movement of said driveshaft and said carriage to rotate said third and fourth shafts to movesaid first and second roof panel wings into folding contact with thefirst and second opposing roof panels.
 4. Apparatus in accordance withclaim 3 wherein said actuating means further comprises shoulder means onthe lower portion of said drive shaft for engaging a shoulder on saidcarriage during the upward travel of said drive shaft to raise saidcarriage with said drive shaft after an initial period of upwardmovement of said drive shaft with respect to said carriage.
 5. Apparatusin accordance with claim 4 wherein said first, second, third and fourthshafts are located below the bottom of said gable panels and said roofpanels of said carton in said score breaking station when said first andsecond roof panel wings are in contact with said roof panels. 6.Apparatus in accordance with claim 5 wherein each of said first andsecond roof panel wings has a generally rectangular configuration whichis at least substantially the size of the respective one of said roofpanels; and wherein each of said first and second triangular gable wingsis shaped and positioned to contact only the central triangular panel ofthe respective gable panel.
 7. Apparatus in accordance with claim 1wherein said actuating means comprises a drive shaft mounted in saidcarriage for vertical movement relative thereto, means biasing saidcarriage downwardly on said drive shaft, first and second racks mountedon said drive shaft for movement therewith, first and second piniongears mounted on said third and fourth shafts, respectively, inengagement with said first and second racks, respectively, and stopmeans to stop the downward movement of said carriage after said firstand second gable wings have been rotated into folding contact with thefirst and second opposing gable panels of the carton in said scorebreaking station while permitting the continuation of the downwardmovement of said drive shaft against said means biasing said carriage,to effect relative movement of said drive shaft and said carriage torotate said third and fourth shafts to move said first and second roofpanel wings into folding contact with the first and second opposing roofpanels.
 8. Apparatus in accordance with claim 7 wherein said actuatingmeans further comprises shoulder means on the lower portion of saiddrive shaft for engaging a shoulder on said carriage during the upwardtravel of said drive shaft to raise said carriage with said drive shaftafter an initial period of upward movement of said drive shaft withrespect to said carriage.